Below is quoted text from the entry for Adam, in the 1911 Encyclopedia Brittannica (cache); which is in public domain. I have highlighted below the section which claims Haoma is parallel with the Christian "Tree of Life". I only include this segment of text so as not to confuse while proving the fact the link has been verifiably made.
Next, which of the trees is the 'tree of life'? Various sacred trees were known to the Semitic peoples, such as the fig-tree (cp. iii. 7), which sometimes appears, conventionalized, as a sacred tree.*9 But clearly the tree referred to was more than a 'sacred tree'; it was a tree from whose fruit or juice, as culture advanced, some intoxicating drink was introduced. The Gaokerena of the Iranians *10 is exactly parallel. At the resurrection, those who drink of the life-giving juice of this plant will obtain 'perfect welfare,' including deathlessness. It is not, however, either from Iran or from India that the Hebrew tree of life is derived, but from Arabia and Babylonia, where date-wine (cp. Enoch xxiv. *4) is the earliest intoxicant. Of this drink it may well have been said in primitive times (cp. Rig Veda, ix. 90. 5, of Soma) that it 'cheers the heart of gods' (in the speech of the vine, Judg. ix. 13). Later writers spoke of a 'tree of mercy,' distilling the 'oil of life,' *11 i.e. the oil that heals, but 4 Esdr. ii. *12 (cp. viii. 53) speaks of the 'tree of life,' and Rev. xxii. 2 (virtually) of 'trees of life,' whose leaves have a healing virtue (cp. Ezek. xlvii. 12). The oil-tree should doubtless be grouped with the river of oil in later writings (see PARADISE). Originally it was enough that there should be one tree of life, i.e. that heightened and preserved vitality.
A third enigma — why no 'fountain of life'? The references to such a fountain in Proverbs (xiii. 14, &c.) prove that the idea was familiar,12 and in Rev. xxii. 1 we are told that the river of Paradise was a 'river of water of life' (see PARADISE). The serpent, too, in mythology is a regular symbol of water. Possibly the narrator, or redactor, desired to tone down the traces of mythology. Just as the Gathas (the ancient Zoroastrian hymns) omit Gaokerena, and the Hebrew prophets on the whole avoid mythological phrases, so this old Hebrew thinker prunes the primitive exuberance of the traditional myth.
- 10 Gaokerena is the mythic white haoma plant (Zendavesta, Vendidad, xx. 4; Bundahish, xxvii. 4). It is an idealization of the yellow haoma of the mountains which was used in sacrifices (Yasna, x. 6-10). It corresponds to the soma plant Asclepias acida of the ancient Aryans of India. On the illustrative value of Gaokerena see Cheyne, Origin of the Psalter, pp. 400-439.
- NOTE: Since the time of this writing Sarcostem Acidum and many other plants have been identified as being Haoma or Soma however there is still debate to this day. We of the COC hope to clear up the confusion by providing the proofs in verifiable research, text, and our Factual knowledge that can be gained in no other way than to be intimately familiar with the Cannabis plant and all of it's unique properties.
Before a scholar qualifies to rule out Cannabis, as the most likely candidate for Haoma, they should at least be able to make the claim they have grown and manipulated the plants growth so as to see all the forms this plant can take. Further, they would need to dry, store, have seen mildew and mold set in, and have many years of experience in order to compete with many of today's elders, (whom have been users of cannabis), and can identify particular strains by smell and sight.